Home / 5,135.12-7,082.92-3,143.12

Finding the Fourth Proportional to 5,135.12, 7,082.92 and 3,143.12

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Solution

The fourth proportional to 5,135.12, 7,082.92 and 3,143.12 is: 4,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.12 : 7,082.92 = 3,143.12 : x
  2. Step 2: Convert to fraction form
    5,135.12/7,082.92 = 3,143.12/x
  3. Step 3: Cross multiply
    5,135.12x = 7,082.92 × 3,143.12
  4. Step 4: Simplify right side
    5,135.12x = 22,262,467.51
  5. Step 5: Solve for x
    x = 22,262,467.51/5,135.12
  6. Step 6: Final answer
    x = 4,335.34

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.